PCB Piezotronics,
a world leader in vibration, acoustic, pressure, force and torque
sensors has announced that its range of IMI Sensors electronic
vibration switches meets the latest CTI (Cooling Technology Institute)
vibration limits standards and offers reliable vibration protection
at the low price of mechanical switches.

Series 686 Smart vibration switches are fully user and field
programmable via a USB interface and offer a low cost drop-in
replacement for most popular mechanical vibration switches. Smart
vibration switches feature an embedded piezoelectric accelerometer
for superior accuracy and monitor vibration velocity for more
consistent results leading to fewer false trips and more reliable
measurement than can be provided by mechanical switches.

By meeting the new CTI vibration limits standards, Series 686
Smart vibration switches are ideal for use in air conditioning
cooling tower fans and gearboxes to ensure equipment is effectively
protected from excessive vibration should fault conditions arise.
Additional applications include 24/7 machinery protection, fin
fans, motors and pumps.

Product highlights include a solid-state relay for ultra-reliable
operation, two-wire operation for use with existing switch systems,
Remote Reset AnywhereTM for safety and convenience, exclusive
Magnetically Adjustable Vibration Threshold (MAVTTM) for setting
alarm threshold automatically and hazardous area approved models
available. Programmable delays can be used to eliminate false
trips.

In addition to being more reliable than mechanical vibration
switches, Series 686 Smart vibration switches provide a much
lower cost solution for many electronic vibration switch applications
where a single relay provides sufficient protection and/or an
overall vibration output (typically 4-20mA) is not required.
Multiple Smart vibration switches can be used in series or parallel
to monitor several points or machines as necessary. They can
also be used in conjunction with external SPST or DPDT relays
to increase current capacity or when such relays are a requirement
of the application.

For applications where a full featured electronic vibration switch
is required including dual set points (relays), 4-20mA overall
vibration output or the raw vibration signal output for performing
vibration analysis, PCB Piezotronics offers the IMI Series 685B
Electronic vibration switch. It offers lower cost and direct
replacement (with optional adapter plate) for popular model 440,
450, 6140 and SW6000 switches.